Hello.
Now, build environment is only Ubuntu 18.04 (bionic).
But some time ago, the build environment was Ubuntu 16.04 (xenial).
How can I build armbian on Xenial?
Maybe, I have to change branch to another, or checkout to certain commit?
Help me please...

And I have the second question.
When I run hostapd as daemon in background (hostapd -B /etc/hostapd.conf), how can I stop the hostapd?
The one way (I think wrong way) I can ps -ef | grep hostapd and then hill the precess.

I have resolved this problem due to this forum:
https://www.raspberrypi.org/forums/viewtopic.php?t=17702
But I have the question.
This method works:
rmmod dhd
modprobe dhd op_mode=2
But this method does't work:
echo 2 > /sys/module/dhd/parameters/op_mode
Why?
How can I to change some script in sources in order to this module insert with op_mode=2 by default?

Igor, thank you for this hint.
I have the small success.
I have done
rmmod dhd
modprobe dhd op_mode=2
After it, I can scan and see my SSID via mobile phone.
But, when I trying to connect to it, my phone can't obtain IP address.
Do I have error on my hostapd.conf?
Or do I need other actions for successful connecting?

I have created file /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
with
echo "[keyfile]" > /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
echo "unmanaged-devices=interface-name:wlx0013ef6c46e3" >> /etc/NetworkManager/conf.d/10-ignore-interfaces.conf
service network-manager restart
I run hostapd -dd /etc/hostapd.conf and also no AP

Do you mean, I need add
[keyfile] unmanaged-devices=mac:00:19:e0:57:86:af
to file /etc/NetworkManager/NetworkManager.conf?
By the way, without telling Network manager, I can to connect to WiFi modem via wpa_supplicant. Is it OK?

Thank you.
But, for some reasons, I use older version of Armbian (5.33) for my BananaPi M2+.
And, in menu Wired Wireless Bluetooth Hotspot only 3 items:
IP
Clear
Advanced
And it is no Hotspot item.
How can I make AP via hostapd?

Hello guys.
I try to configure AP on WiFi.
I have created /etc/hostapd/hostapd.conf:
interface=wlan0
driver=nl80211
country_code=IN
ssid=TEST
hw_mode=g
channel=6
wpa=2
wpa_passphrase=12345678
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
auth_algs=1
macaddr_acl=0
Then I have uncommented DAEMON_CONF="/etc/hostapd/hostapd.conf"
in /etc/default/hostapd.
After it, I run /etc/init.d/hostapd restart
And I try to scan WiFi via mobile phone, and no TEST.
What am I doing wrong?